mirror of https://github.com/proot-me/proot.git
55 lines
897 B
C
55 lines
897 B
C
#include <unistd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/ptrace.h>
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#include <signal.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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int main(int argc, char **argv)
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{
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int child_status;
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long status;
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pid_t pid;
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pid = (argc <= 1 ? fork() : vfork());
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switch(pid) {
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case -1:
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perror("fork()");
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exit(EXIT_FAILURE);
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case 0: /* child */
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sleep(2);
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status = ptrace(PTRACE_TRACEME, 0, NULL, NULL);
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if (status < 0) {
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perror("ptrace(TRACEME)");
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exit(EXIT_FAILURE);
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}
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if (argc <= 1) {
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kill(getpid(), SIGSTOP);
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exit(EXIT_SUCCESS);
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}
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else {
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execl("true", "true", NULL);
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exit(EXIT_FAILURE);
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}
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default: /* parent */
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pid = waitpid(-1, &child_status, __WALL);
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if (pid < 0) {
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perror("waitpid()");
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exit(EXIT_FAILURE);
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}
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if (argc <= 1) {
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if (!WIFSTOPPED(child_status))
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exit(EXIT_FAILURE);
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}
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exit(EXIT_SUCCESS);
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}
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return 0;
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}
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